Disclaimer: I have not tried to do this myself.
As you may or may not know, numeric MATLAB arrays do not store text data, so you cannot have a header on them. Cell arrays will store a mixture of text and numeric, but it seems from that documentation that only one-dimensional cell vectors can be mapped directly.
So, you may need to pass the numeric data and the header data separately.
But, as I said, I am not experienced at this, so there may be a good way that I do not know about.
